Efficient continuous dryer for flexible polyurethane foam and cl

Details Efficient continuous dryer for flexible polyurethane foam and cl Efficient continuous dryer for flexible polyurethane foam and cl

1996-07-30

1999-03-16

Achutamurthy, Ponnathapura

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

134 21, 134 32, 134 30, B08B 300, B08B 102

Patent

active

058824324

ABSTRACT:
A method of cleaning polyurethane foams where the material is transported through a wash station while alternately soaking the polyurethane foam in an organic solvent and squeezing solvent from the polyurethane foam a number of times. Then the polyurethane foam is sent through a rinse or solvent transfer station for reducing the concentration of solvent in the foam. The rinsed polyurethane foam is sent to a drying station wherein the foam is repeatedly squeezed while being exposed to hot air to remove wet air from the foam.

REFERENCES:
patent: 4098649 (1978-07-01), Redker
patent: 4728045 (1988-03-01), Tomaszek
patent: 5169588 (1992-12-01), Estepp
patent: 5198471 (1993-03-01), Nauman
patent: 5222267 (1993-06-01), Fierro
patent: 5250197 (1993-10-01), Marcel

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